#1
if you have a 16 ohm head and 4x12 could you also hook an 8ohm 2x12 into it? (make like a 3/4 stack)
#2
You can but unless your amp is designed to do so (see the manual) you've now got a mixed impedance greater than 16ohms, which can damage your head.
It's a fine line between clever and stupid.
#3
you should try to match the ohms
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#4
If your amp can do 16oms only, you'd need two, 32ohm cabs. (which are non existant, stock) If your original cab is 16ohms, using it with an 8ohm 2x12 is a no go, as the total load would be 5.3ohms
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Last edited by JimPlaysGuitar at Feb 14, 2007,
#5
Quote by Mudder
You can but unless your amp is designed to do so (see the manual) you've now got a mixed impedance greater than 16ohms, which can damage your head.

Impedance greater than what the amp is designed for won't do any harm - the output power will simply be reduced and you'll get crappier tone and less volume.

However, in this case the input impedance would drop, which could and probably will blow your output transformer. If your amp has an impedance selector, you could hook up both cabs in parallel. Assuming your current 4x12 is 16 ohms, the total impedance of the two in parallel would be 5.3 ohms. Setting the amp to 4 ohms should work out well enough.
#6
what if the head is 16 ohms and the 4x12 is 16 ohms would that be ok? (no 2x12)
#7
Quote by indrek13
Impedance greater than what the amp is designed for won't do any harm - the output power will simply be reduced and you'll get crappier tone and less volume.

However, in this case the input impedance would drop, which could and probably will blow your output transformer. If your amp has an impedance selector, you could hook up both cabs in parallel. Assuming your current 4x12 is 16 ohms, the total impedance of the two in parallel would be 5.3 ohms. Setting the amp to 4 ohms should work out well enough.


You're right, of course. My public school math education hard at work.
It's a fine line between clever and stupid.
#8
Going too far in either direction is bad. 4 ohms should be fine into 5.3 ohms and so should 8.
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#9
Quote by garrett7
what if the head is 16 ohms and the 4x12 is 16 ohms would that be ok? (no 2x12)

Yes, that would work just fine.